Title :
Conductor temperature monitoring system in underground power transmission XLPE cable joints
Author :
Nakamura, S. ; Morooka, S. ; Kawasaki, K.
Author_Institution :
Mitsubishi Cable Industries Ltd., Tokyo, Japan
fDate :
10/1/1992 12:00:00 AM
Abstract :
A conductor temperature monitoring system using the current method was developed to estimate conductor temperatures at joints of extra-high-voltage (EHV) underground power transmission XLPE cables in real time. The validity of the software and hardware was confirmed by measurements on an extrusion molded joint (EMJ) of a 275 kV 1×2500 mm2 aluminum-sheathed XLPE cable. The mean circumferential jacket surface temperature over the EMJ, where the cross section was larger than that at the cable portion, was measured by a line thermosensor using thermocouples or a distributed temperature sensor using an optical fiber. The conductor temperature in the cable joint was estimated by numerically solving simultaneous differential equations with 31 unknowns. A system which allows measurement of the cable conductor current at insulation joints of installed lines was also developed
Keywords :
cable jointing; computerised monitoring; differential equations; organic insulating materials; polymers; power cables; temperature measurement; underground cables; 275 kV; Al cable sheathing; EHV; XLPE cable joints; circumferential jacket surface temperature; conductor temperature monitoring system; distributed temperature sensor; extra-high-voltage; extrusion molded joint; hardware; insulation joints; line thermosensor; optical fiber; simultaneous differential equations; software; thermocouples; underground power transmission; Conductors; Hardware; Optical fiber cables; Optical fibers; Power transmission; Real time systems; Software measurement; Temperature measurement; Temperature sensors; Underground power cables;
Journal_Title :
Power Delivery, IEEE Transactions on
